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3D model (
JSmol)
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ChemSpider | |
PubChem
CID
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CompTox Dashboard (
EPA)
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Properties | |
N3−N=O | |
Molar mass | 72.027 g·mol−1 |
Appearance | Pale yellow solid below −50 °C (−58 °F). Above that temperature it decomposes. |
Related compounds | |
Related compounds
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Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
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Nitrosyl azide is an inorganic compound of nitrogen and oxygen with the chemical formula N3−N= O. It is a highly labile nitrogen oxide with the empirical formula N4O.
Nitrosyl azide can be synthesized via the following reaction of sodium azide and nitrosyl chloride at low temperatures:
Below −50 °C, nitrosyl azide exists as a pale yellow solid. Above this temperature, it decomposes into nitrous oxide N2O and molecular nitrogen N2: [1]
Characterization of the compound with IR and Raman spectroscopy show absorption bands that agree well with calculated values for a trans-structure. [1] [2] Quantum chemical calculations show a cis-form higher in energy by 4.2 kJ/mol and an aromatic ring form ( oxatetrazole N4O) that is more stable by 205 kJ/mol. However, the cyclization to the ring form would have to surpass the 205 kJ/mol activation energy barrier require to bend the azide group, which might explain why nitrosyl azide is stable enough to be isolated at low temperature. [1]